SPE Library
The SPE Library contains thousands of papers, presentations, journal briefs and recorded webinars from the best minds in the Plastics Industry. Spanning almost two decades, this collection of published research and development work in polymer science and plastics technology is a wealth of knowledge and information for anyone involved in plastics.
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Conference Proceedings
Effective PVC Heat Stabilization in the Post-REACh Era
Tony DiMaio, September 2010
PowerPoint Presentation at Vinyltec 2010.
DOW ECOLIBRIUM™ Bio-Based Plasticizers - Greening of PVC with Renewably Sourced Plasticizers
Bharat I. Chaudhary | R. Eaton | B. Sczekalla | C. Laufer | B. Neese | A. Ghosh-Dastidar, September 2010
PowerPoint Presentation at Vinyltec 2010.
High Performance PVC Roofing – An Active Asset
Ballensky, September 2010
PowerPoint Presentation at Vinyltec 2010.
Landfill Biodegradation
Richard F. Grossman, September 2010
PowerPoint Presentation at Vinyltec 2010.
NGO’s What is on the Horizon
Devon Wm. Hill, September 2010
PowerPoint Presentation at Vinyltec 2010.
PVC Bio-Composites: Pelletized Natural Fiber/PVC Composites, Improving Cost and Performance in GREEN Building Products
Edward Schut, September 2010
PowerPoint Presentation at Vinyltec 2010.
Vinyl Building Materials Recycling Update
Richard Krock, September 2010
PowerPoint Presentation at Vinyltec 2010.
The Importance of Risk Assessment as a Materials Selection Criterion
Richard Krock, September 2010
PowerPoint Presentation at Vinyltec 2010.
Vinyl Siding and Sustainability: Challenges and Opportunities
David S. Johnston, September 2010
PowerPoint Presentation at Vinyltec 2010.
Economic Outlook
Robert Fry, September 2010
This presentation p contains forward‐looking statements based on expectations, estimates and projections that are not guarantees of future performance and involve a number of uncertainties and assumptions. The content is provided “AS IS,” “AS AVAILABLE.” DuPont does not warrant the accuracy or completeness of the information, text, graphics, links, or other items contained in this communication, and DuPont expressly disclaims liability for errors or omissions in these materials. We reserve the right to make changes and corrections at any time, without notice. DuPont expressly disclaims all liability for the use or interpretation by others of information contained in this DuPont communication. Decisions based on information contained in this DuPont communication are the sole responsibility of the reader, and in exchange for using this DuPont communication the reader agrees to hold DuPont harmless against any claims for damages arising from any decisions that the reader makes based on such information. Nothing contained in this DuPont communication constitutes investment advice.
Non-Tin Heat Stabilizers for Clear rigid PVC Applications
Masumi Mizu | Taro Mitsudera | Tadashi Sengoku | Kiyotatsu Iwanami | Toshinori Yukino | Hiroshi Nishimura | Robert G. Weiler, September 2010
The purpose of this paper is to describe the development of a new class of Calcium/Zinc heat stabilizer for clear rigid PVC applications. Typically, until this time, Organo-Tin based heat stabilizers have been used for this application. Organo-Tin heat stabilizers offer excellent transparency and good heat stability protection. Recently, Butyl-Tin based heat stabilizers have been designated as an environmental Substance of Very High Concern (SVHC) in EU. This has led us to research and develop alternative heat stabilizers for clear rigid PVC applications. Liquid Barium/Zinc based heat stabilizers offer good transparency but they typically do not have enough heat stability under rigid PVC processing conditions. They also have the environmental problem of the heavy metal, Barium. Typical Calcium/Zn stabilizers have good heat stability, and are environmentally more acceptable, but typically are deficient in transparency. Our purpose in this paper is to describe a technique for selecting individual components for a high transparency powder Calcium/Zinc heat stabilizer and to demonstrate that the transparency and heat stability are suitable for the task of protecting clear rigid PVC applications. Three important technical points necessary for improving transparency were described. First is refraction (Refractive index). Second is scattering (particle size). And third is dispersion (compatibility). Ideal state satisfied these three points.
ADDITIVE PROCESSING ƒ??NEW MATERIALS FOR FUSED DEPOSITION MODELLING
Bettina Wendel , Claus M. Dallner , Ernst Schmachtenberg, May 2010
Additive processes are increasingly used to generate functional components in almost any geometry layer by layer directly from CAD-files without using tools and molds. Within the scope of this paper it is shown how the limited variety of materials can be extended for fused deposition modelling to reach new areas of application and how these new materials are to be manufactured. First functional prototypes could successfully be produced and characterized.
ADDITIVE PROCESSING – NEW MATERIALS FOR FUSED DEPOSITION MODELLING
Bettina Wendel , Claus M. Dallner , Ernst Schmachtenberg, May 2010
Additive processes are increasingly used to generate functional components in almost any geometry layer by layer directly from CAD-files without using tools and molds. Within the scope of this paper it is shown how the limited variety of materials can be extended for fused deposition modelling to reach new areas of application and how these new materials are to be manufactured. First functional prototypes could successfully be produced and characterized.
PROCESSING AND PERFORMANCE OF HDPE POLYMER BLENDS INCLUDING POST CONSUMER RECYCLED HDPE
T. Beiss, C. Dallner, E. Schmachtenberg, May 2010
With the rapid increase in the market for recycled polyethylene from various sources, there is an urgent need to quantify the performance of these materials. Blends of recycled high density polyethylene (HDPE) were prepared to obtain specific mechanical properties and MFI. The results show that the MFIs had significant effect on the rheological, mechanical and phase morphology characteristics of the various blends.
VIBRATION JOINING OF FILAMENT REINFORCED THERMOSETS
T. Beiss , C. Dallner , E. Schmachtenberg, May 2010
At the Institute of Polymer Technology (LKT) a vibration joining technique was developed that offers short cycle times and represents a modification of hotmelt bonding using the machine technology from vibration welding. It is suitable to join thermoplastics with thermoset materials or thermosets using a thermoplastic interlayer by taking advantage of short cycle time and excellent lap-shear strength compared to bonding with reactive adhesives.
POLYMER FLOW ANALYSIS ON AN AUTOMOTIVE INSTRUMENT PANEL
Harsh Bhagat, May 2010
Mold filling simulations are sophisticated programs providing immense benefits for the plastics injection molding industry. The use of simulation techniques has improved the processability of large tools resulting in improved finished part quality.
POLYMER FLOW ANALYSIS ON AN AUTOMOTIVE INSTRUMENT PANEL
Harsh Bhagat, May 2010
Mold filling simulations are sophisticated programs, providing immense benefits for the plastics injection molding industry. The use of simulation techniques has improved the processability of large tools resulting in improved finished part quality.
RHEO-OPTICAL MEASUREMENTS IN MICROMOULDING
B.R. Whiteside , R. Spares , P.D. Coates, May 2010
Flow visualisation has previously been used to study injection moulding. The smaller length scales associated with micro-moulding allow some additional measurements to be taken but pose new challenges due to the lower filling and cooling times. We have developed an experimental toolset for visual observation in micromoulding cavities via a sapphire window system that allows the study of mould filling post filling shrinkage of the polymer away from the cavity surface and determine the evolution of birefringence during solidification.
RHEO-OPTICAL MEASUREMENTS IN MICROMOULDING
B.R. Whiteside , R. Spares , P.D. Coates, May 2010
Flow visualisation has previously been used to study injection moulding. The smaller length scales associated with micro-moulding allow some additional measurements to be taken, but pose new challenges due to the lower filling and cooling times. We have developed an experimental toolset for visual observation in micromoulding cavities via a sapphire window system that allows the study of mould filling, post filling shrinkage of the polymer away from the cavity surface, and determine the evolution of birefringence during solidification.
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